论文标题
探测对称顶部分子中变形核的基本对称性
Probing Fundamental Symmetries of Deformed Nuclei in Symmetric Top Molecules
论文作者
论文摘要
重型变形核中的Schiff力矩的精确测量是超出标准模型$ t的敏感探针，p $ t，p $侵略。尽管迄今为止，对Schiff力矩的最敏感限制是用Dimagnetic原子设置的，但极性多原子分子可以具有具有独特的实验优势的更高敏感性。特别是，对称顶部分子离子具有相反平价的$ k $ - 双式离子，尤其是小分裂，导致低场的完全极化，内部共磁力仪态有助于拒绝系统效应，以及对$ t，p $攻击的敏感搜索的能力，使用少量的包含浓重外来的外来核心的诱捕离子来进行$ t，p $ - 侵入。我们将对称的顶部阳离子$^{225} $ raoch $ _3^+$作为一种典型和候选平台，用于执行敏感的核席夫测量值，并使用相对论的AB ISLIOO方法详细介绍其内部结构。从变形核，较大的极化性和独特的分子结构中增强功能的结合使该分子成为搜索基本对称违规的有前途的平台，即使是单个捕获的离子也是如此。
Precision measurements of Schiff moments in heavy, deformed nuclei are sensitive probes of beyond Standard Model $T,P$-violation in the hadronic sector. While the most sensitive limits on Schiff moments to date are set with diamagnetic atoms, polar polyatomic molecules can offer higher sensitivities with unique experimental advantages. In particular, symmetric top molecular ions possess $K$-doublets of opposite parity with especially small splittings, leading to full polarization at low fields, internal co-magnetometer states useful for rejection of systematic effects, and the ability to perform sensitive searches for $T,P$-violation using a small number of trapped ions containing heavy exotic nuclei. We consider the symmetric top cation $^{225}$RaOCH$_3^+$ as a prototypical and candidate platform for performing sensitive nuclear Schiff measurements and characterize in detail its internal structure using relativistic ab initio methods. The combination of enhancements from a deformed nucleus, large polarizability, and unique molecular structure make this molecule a promising platform to search for fundamental symmetry violation even with a single trapped ion.
